Enemies

The Society for Observing and Neutralizing Inter-dimensional Creatures and Xenomorphs (or simply S.O.N.I.C.X.) is a secret organization in the Sonic X comic series published by Archie Comics. They are dedicated to destroy Sonic and his friends, due to Sonic (both directly and indirectly) ruining their lives in one way or another.

They are led by Captain Westwood (under the alias Organizer), who only appears to his comrades via video conferencing and is always obscured by shadows. It was Jerome Wise who thought up their expanded (and, in Sonic's opinion, ridiculous) name, having stayed up all night on the Internet in order to do so.

This organization did not appear in the Sonic X anime series although many of the organization's members had small cameos in the anime.

Coincidentally, the acronym spells out the titular anime and comic series' name. Humorously, Sonic mocked them when he first met the group, believing them to be "[his] fan club".

It is unknown what the group planned to do to Sonic while they had him captured.

Trivia

All of the members except for Captain Westwood were present in the Sonic X anime. Hector Dragg made a brief appearance in the first episode as a member of the Speed Team, but he wasn't referred to by name or seen afterward.

Although it is not acknowledged, Li Yan's gang (Bruiser Boys) seem to also be part of the group, but whether as official members or just associates is unclear.

It is also worth noticing that Yan is the only member whose revenge isn't directly towards Sonic, but rather his friend Knuckles.